Glacial Grooves State Memorial

Glacial Grooves State Memorial

A National Natural Landmark, the Glacial Grooves on the north side
of Kelleys Island are the largest easily accessible
such grooves in the world and are accessible daily in season, weather-permitting,
via ferry. From a walkway, footbridge, and stairs you can look down on the immense
grooves, which are 400 ft long, 35 ft wide, and up to 10 ft deep, suggesting the
tremendous power of the ice that formed them. Glacial Grooves Geological
Preserve contains marine fossils that are 350 to 400 million years old. They
were scoured into solid limestone bedrock about 18,000 years ago by the great
ice sheet which covered part of North America. Open year-round, dawn-dusk.